/* 将默认body 的margin值改为0，当内容出现滚动条则不包含margin部分 */
html, body{background-color: #e7eaed; height:100%; margin: 0 !important;}
body{
    font-family: Arial, Helvetica, sans-serif; font-size:16px; line-height: 16px;
    /* 下面四行是设定不允许双击选中 */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.row{margin:0; padding:0;}
.col{margin:0; padding:0;}
.bg-light{border-radius:0;}
.form-control:focus{outline:none; box-shadow: none; -webkit-box-shadow:none;}
.form-select:focus{outline:none; box-shadow:none; -webkit-box-shadow:none;}
.form-control{border-radius: 0;}
.form-select{border-radius:0;}
.btn{border-radius:0;}